Handling: hand and hoist-line implements – Hook – hoistline – or grab type – Locking device
Patent
1992-02-27
1993-08-10
Mitchell, David M.
Handling: hand and hoist-line implements
Hook, hoistline, or grab type
Locking device
294115, B66C 128, B25J 1508
Patent
active
052342441
ABSTRACT:
A bi-directional feeding gripper device including a single cylinder and upper and lower cylindrical cap members mounted to upper and lower ends of the cylinder and provided with pneumatic pressure passages communicated with the interior of the cylinder, respectively. An upper lifting piston having a driving rod and a lower gripping piston spaced from the lifting piston are disposed in the cylinder. A compression coil spring is disposed around the driving rod between the lifting piston and the gripping piston. The driving rod extends through the gripping piston such that its lower end is protruded beyond the lower end of the lower cap member. The gripper device also includes a gripper fixed to the lower end of the gripping piston to move vertically together with the gripping piston and provided with a pair of fingers each having one end pivotally mounted to the gripper and the other end pivotally mounted to the protruded lower end of the driving rod. With this construction, the gripper device can perform a bi-directional movement including upward and downward movements of the gripper and opening and closing movement of fingers, by means of the single cylinder, thereby enabling the overall construction to be simplified and the overall cycle time to be reduced.
REFERENCES:
patent: 2016683 (1935-10-01), Moore
patent: 3463226 (1969-08-01), Johnson
patent: 4348044 (1982-09-01), Wood, III
patent: 4569549 (1986-02-01), Nakashima et al.
patent: 4729588 (1988-03-01), Kratzer
patent: 5040836 (1991-08-01), Roudaut
Korea Institute of Science and Technology (KIST)
Kramer Dean J.
Mitchell David M.
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